Abstract
In this study, the usability of pumice powder and lime in concrete production as a binding additive for rigid superstructure concrete road pavement was investigated. Following the determination of the optimum binder ratio, these new binder ratios were used in crushed limestone concrete production. The concrete thus formed was named concrete containing cement, pumice powder and lime (PPCC). The normally produced concrete, without pumice powder and lime binder was selected as reference concrete (RC). Regarding the total binder amount of the most appropriate binder ratio 50% was found to be cement, 30% pumice powder and 20% lime in the result of the study. In consequence of the study, the 20 ± 2 °C and 7–28 days compressive strengths of the reference concrete were found to be 33.8 MPa and 38.2 MPa and its bending strengths were 4.2 MPa and 4.7 MPa. The 20 ± 2 °C and 7–28 days compressive strengths of PPCC were found to be 25.1 MPa and 28.3 MPa and its bending strengths were 3.2 MPa and 3.5 MPa. The results of the study showed the usability of PPCC in concrete pavement.
Highlights
The term “pumice” is called “ponce” in French, whereas the stones with medium particle size are called “pumice” in English [1]
The presence of pores in coarse pumice gives the extremely low compressive and bending strengths, and such materials cannot be used as aggregates in concrete production
A total of 72 types of concrete samples were composed with different mixing ratios, which were formed with cement, pumice powder and lime mixtures
Summary
The term “pumice” is called “ponce” in French, whereas the stones with medium particle size are called “pumice” in English [1]. Pumice stone formations, which are formed because of volcanic events and have a cavernous, spongy structure, are found in many regions of the world where volcanic activities take place [2]. Pumice contains numerous pores ranging from macro scale to micro scale due to the sudden release and sudden cooling of the gases it embodies during its formation. Pumice sources identified around the world are approximately 18 billion m3 [5]. Regarding pumice beds, Bitlis province has significant potential due to both volcanic area and geological structure. The beds in question are located in the Tatvan district of Bitlis province and 81,500,000 m3 pumice beds of good quality are available [6,7].
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